From: Zellyn Hunter <ruby-list@...>
Date: 2003-06-20T21:44:05+09:00
Subject: Re: Code generation and state machines

On Friday 20 June 2003 06:34, Robert Klemme wrote:
> I'd store the state info in an instance variable of the class instance and
> not use a class variable, because the latter is inherited and thus visible
> to sub classes.

Okay - I understand that.  I take it class instance variables are not 
inherited, then?

> I also wonder why your state machine runs automatically in method run.

Yeah.  The run method is as simple as possible to demonstrate the principles - 
at the moment I'm worried about classes, superclasses, instances, and syntax 
extension (the "state" and "transition" keyword-looking functions used to 
easily define state machines).  The run method will definitely change, 
probably in the direction you've mentioned.  I like the event idea - I'll 
have to think about it a little more.

> Also, is it possible that you use 0 to mean "false"? This is true for Perl
> but not Ruby.  In Ruby the only two values that are equivalent to false
> are false itself and nil.

Aah.  Yes, oops!  It's going to be difficult getting used to that one!


Thanks for your help!

Zellyn